Hot-water heating-boiler.



919.56.. bang T. D. MAOGREG'OR.

HOT WATER HEATING BOILER.

APPLICATION FILED FEB. 21, 1911.

1,021.416. Q Patented Mar. 26, 1912.

Has.

2 SHEETS-SHEET 1.

T. D. MAOGREGOR.

HOT WATER HEATING BOILER.

urmonmu FILED FEB. 21; 1911.

Patented Mar. 26, 1912.

2 SHEETS-SHEET 2.

cOLUMBIA PLANOGIIAPH CU" WASHINGTON, n. c.

THOMAS DUNCAN MACGREGOR, OF DAVISVILLE, ONTARIO, CANADA.

HOT-WATER HEATING-BOILER;

Specification of Letters Patent. Patented Dia 26, 1912.

Application filed February 21, 1911. Serial No. 609,982. g

To all whom it may concern:

Be it known that I, THOMAS DUNCAN MACGREGOR, of the village ofDavisville, in the county of York, in the Province of Ontario, Canada,have invented certain new and useful Improvements in Hot-WaterHeating-Boilers, of which the following is the specification.

My invention relates to improvements in hot water heating boilers andthe object of the invention is to construct a boiler wherein the lengthof travel of the heat and smoke before passing to the smoke-pipe is'materially increased and the water thus more effectively heated. Afurther object is to provide a boiler in which the heated water will berapidly delivered to the radiators and in which the cool water from theradiators will be warmed before being finally returned to the fire potto be heated again.

A still further object is to provide means whereby the length of travelof the heat and smoke may be varied before passing to the smoke-pipe.

My invention consists of a number of superimposed water sections havinga suitable heat space between each pair of sections, said sections beingconstructed of. preferably oblong form although they may be of elliptical, circular or other suitable form, push nipples connecting thesections together, a header at the top of the boiler for the delivcry ofthe cool water to .t-hesaid sections, one or more lower sections ofsimilar form to the upper sectionsbut independent thereof, said lowersections to be directly-connected to the fire-pot of the boiler, adischarge pipe passing up from the fire pot and connected to the. lowersections but independent of the upper sections and provided at its topabove the boiler wit-h a header for the delivery of the hot water to therespective radiators, a pipe connecting the upper sect-ions with thebottom ofthe fire pot and a belt extending almost entirely around thefire pot and having a series ofperforations on its inner wall for theeven distribution of the water around the wall at the base of thefire-pot all as hereinafter more particularly. described in theaccompanying drawings in which Figure 1 represents a vertical sectionof.

the boiler through the line bb. (Fig. 2). Fig. 2', is a horizontalsection of the same plan view of a modified water section. Fig. 1, is avertical section of, the boiler through the line dd (Fig. 1) taken atright angles to the section shown in Fig. 1. Fig. 5 is a horizontalsection through the line CC' (Fig. 1).

Like letters of reference indicate corresponding parts in each figure.

l is afire pot and 2 is a belt cast or otherwise suitably formed thereonat the base of the fire pot.

3 are perforations at the bottom of the inner wall of the belt, saidtending around the same.

4 is a suitable draincock to take off waste water.

5 is a pipe cast on to the fire pot or otherwise suitably connectedthereto.

6 is a push nipple seated at the bottom in the top portion 1 of the firepot, the pipe 5 being also seated in the said portion. The push nipple 6is seated at the top in the lowest of the upper water sections 7.

1 is a vent extending through the top of the fire pot and allowing thesmoke and heat to pass from the fire into the smoke and heat spaces 8.

through line aa (Fig. 1). Fig. 3, is a perforations eX- 9 is an outletpipe from the fire pot, connecting with the lower section 10, saidoutlet pipe being provided at its top with a header 11 having pipes 12for distributing the heated water to the respective radiators. The

lower water section 10 as above stated iscon 1 nected directly to thepipe 9 and isindependent of the upper sections 7 and the pipe 5, saidlower section having a. screw nipple 10 formed thereon screwing at thebottom into the top portion 1 of the fire-pot and at the top into thepipe 9.

' 13 are push nipples connecting the upper water sections together ateach end thereof.

14 is a header at the top of the upper. section 7 having return pipes 15connected to the various radiators.

16 is an end smoke casing suitablysecured to thesides of the ends oftheupper sections 7,. the lower section 10 and the top. portion 1 of thefire pot and provided with a door 17 having a cross web 17 a formed onits inner .surface, said cross web abutting the end of the lowest upperwater section 7.

18 is an end smoke casing situated at the,

opposite end to the aforesaid casing and at-v -1 tached in a similarmanner to the sides of the ends of the upper section 7 and the lowersection 10 but not extending as far down as the top 1 of the fire-pot.The said casing 18 is connected directly with the smoke pipe 19.

20 is a damper in the smoke casing 18 so situated as to abut the end. ofthe center upper section 7 and designed to shorten the travel of thesmoke through the smoke spaces by cutting out the upper smoke space 8.

21 are lugs formed on the sides of the upper and lower sections near theends thereof and so designed as to receive securing bolts 22 for holdingthe sections firmly against each other.

23 are vertical flanges on each side of the bottom of the water sectionsdesigned to rest on the top of the adjacent section.

24 are outwardly curved flanges on the sides of the top of the watersections de signed to extend outside of the aforesaid flanges 24.Suitable fire cement is inserted between these flanges in order toprevent the leakage of smoke and heat between the same.

25 (Fig. 3) are cut away portions in the sections 7 and 10 so formed asto permit the smoke and heat to pass through these cutaway port-ionsinto the smoke spaces 8 between the sections 7 and 10. This form isdesigned to do away with the end casings 17 and 18 if so desired.

The mode of operation is as follows: The water is primarily heated inthe fire-pot 1 and the lower water section 10 and then directlydischarged into the pipe 9 through the header 11 into pipes 12 andthence immediately to the radiators. Then after circulating through theradiators the water is re turned through the pipes 15 to the header 14and thence circulates down through the upper water sections 7 from thenipples 18 to the bottom push nipple 6 and thence down the pipe 5 andthence through the perforations in the belt to the fire-pot 1 again. Itwill be seen that the water being most eifectively heated in thefire-pot 1 and in the section 10 will be very hot when reaching theradiators and the cooler water returning from the radiators will bewarmed again by passing through the sections 7 before being depositedinto the fire-pot 1 for its final heating before being circulated to theradiators again. Further the heat, smoke and flame passing through thevent 1 will pass under the bottom and over the top of each section untilit reaches the end of the top smoke space when it is discharged into thesmoke pipe '19 as in the form shown in Fig. 1. The two lower smokespaces 8 are connected together by the bottom portion of the casing 17below the web 17 and the two intermediate spaces 8 are connectedtogether by the portion of the casing 18 below the damper 20. The twoupper smoke spaces 8 are connected by that portion of the casing 17above the web 17*; thus the smoke and heat circulates above and belowthe sections alternately from one end to the other until it is finallydischarged through the smoke pipe 19. If the length of travel of thesmoke and heat is found to give an insuflicient draft in lighting up thefurnace the damper 20 may be. opened and the smoke and heat dischargedinto the casing 18 directly from the second smoke space 8 from thebottom and thus up through the end casing 18 into the smoke pipe 19instead of.

passing through the two upper smoke spaces 8. This materially shortensthe length of travel of the smoke and thus proportionately increases thedraft. hen the fire is burning well the damper is closed thus compellingthe smoke and heat to travel through all the smoke spaces 8.

It will be seen from the above description what numerous advantages aboiler constructed according to my invention will possess. The smoketraveling from end to end of the smoke spaces strikes against thenipples 13, the screw nipple '10 and the pipe 9 thus more effectivelyheating the water than is done in the ordinary form of boiler havingcircular sections. Also the length of travel is materially increased andthus the heat and smoke that would otherwise be sent directly up thechimney is utilized thus tending toward a greater economy of fuelconsumption; further the water has not the tendency to get cool asoccurs in the upper section of the ordinary hot water boiler but isdischarged directly to the radiators and the return water is heatedbefore being returned to the fire pot.

Many modifications may be made in my invention without departing fromthe spirit of the invention or scope of the claims and the form shown tobe taken in an illustrative and not in a limiting sense. For instance, Imight place the water sections below the fire-pot and cause the heat andsmoke to be deflected down through the smoke spaces between the watersections.

hat I claim as my invent-ion is:

1. A hot water heating boiler comprising a water jacketed fire pot, aconduit connected to said jacket at one end and having radiator supplypipes connected to its opposite end, and a preheating section arrangedto be heated by the products of combustion, said section being connectedrespectively with radiator return pipes and with the fire pot.

2. A hot water heater comprising a water jacketed fire pot, a watersection adjacent thereto and connected with said jacket, a conduitconnected to said section and having pipe connections for supplyingradiators, a sect-ion in the path of the products of combustion "fromthe fire pot, radiator return pipe connections to said section, and aconnection from said section to said jacket,

pot for its maximum heating prior to cir-' culating to the radiatorsagain as and for the purpose specified.

4. A hot water heating boiler comprising a water jacketed fire-potaround the fire, a heated water section of preferably oblong form andsuitably connected to the fire-pot, a pipe for delivering the heatedwater to the radiators and suitably connected to the water section andsuperimposed return. water sections independent of the aforesaid watersection, the upper section of which being connected to the return pipesfromthe radiators and the lowest of the sections being suitablyconnected to the bottom of the fire-pot, smoke and heat spaces betweenthe return water sections and above and below the heated water sectionand suitably connected together, and means whereby the return water isdistributed around the bot-- tom of the water jacket of the fire-pot, asand for the purpose specified.

'5. A hot water heating boiler comprising a water jacketed fire-potaround the fire, a heated water section of preferably oblong form andsuitably connected to'the fire-pot, a pipe for delivering the heatedwater to the radiators and suitably connected to the water section andsuperimposed return Water section independent of the aforesaid watersections, the upper section of which being connected to the return pipesfrom the radiators and the lowest of the sect-ions being suitablyconnected to the bottom of the firepot, smoke and heat spaces betweenthe return water sections and above and below the heated water sectionsand suitably connected together, and a belt extending around the bottomof the fire pot and having a series of perforations in the inner wall ofthe belt as and for the purpose specified.

6. A hot water heating boiler comprising a water jacketed fire-potaround the fire, a heated water section of preferably oblongformadjacent to the fire pot, a discharge pipe, a screw nippleconnecting the hot water section and the discharge pipe, a header fordistributing the hot Water to the various radiators, superimposed returnwater sections of preferably oblog form, push nipples connecting thereturn water sections together and located at the diagonal corners ofthe aforesaid sections, de-

pending flanges on the side edges of the bottoms of the heated andreturn water sections holding the sections apart, curved flanges on theside edges of the tops of the sections fitting outside the dependingflanges, smoke and heat spaces between the sections, a vent through thetop of the water jacket of the fire-pot connecting with the lowest smokeand heat space,and a belt extending around the bottom of the fire pot, astaggered pipe connected to the belt, a long push nipple for connectingthe pipe with the lowest of the return water sections, and means forconnecting the smoke and heat spaces together whereby the smoke and heatis compelled to travel alternately through the same from one end to theother as and for the purpose specified.

7. A hot water heating boiler comprising a water jacketed fire-potaround a fire, a heated water section of preferably oblong form adjacentto the fire-pot, a discharge pipe, a screw nipple connecting the hotwater section and the discharge pipe, a header at the top of thedischarge pipe, pipes connected to the header for distributing the hotwater to the various radiators, superimposed return watersections ofpreferably oblong form, push nipples connecting the return watersections together and located at the diagonal corners of the aforesaidsections, depending flanges on the side edges of the bottoms of theheated and return water sections holding the sections apart, curvedflanges on the side edges of the tops of the sections fitting outsidethe depending flanges, smoke and heat spaces between the sections, avent through the top of the water jacket of the fire-pot connecting withthe lowest smoke and heat space and a belt extending around the bottomof the fire-pot, a staggered pipe connected to the belt, a long pushnipple for connecting the pipe with the lowest of the return watersections, a casing at the end of the return water sections, the hotwater section and the top portion of the fire-pot for connecting thesmoke spaces together, a door in the end of the casing, a web formed onthe door and extending laterally across the casing, the web dividing thesame into two'portions and abutting the lowest of the return watersections, a second casing at the other end of the return water sectionsand the heated water section, said casing connecting with the smokepipe, and a damper extending laterally across the casing and abuttingthe intermediate return water section and capable of being opened andclosed as and for the purpose specified.

8. A water heating boiler comprising a jacketed fire pot, means forconnecting the jacket to the radiators, water sections above the firepot, connected to receive the return water from the radiators and alsoconnected to the Water acket, and means for passing the products ofcombustion from the fire pot around said sections in a direction reverse to the direction of flow of Water therethrough 9. A hot Waterheating boiler comprising a jacketed fire pot, conduits for connectingthe jacket directly with the radiators, Water sections above the firepot, and conduits for circulating the products of combustion around thesections the return Water from the radiators circulating through thesections in a direction opposite to the circulation of the products ofcombustion.

THOMAS DUNCAN MAGGREGOR. lVitnesses:

I-I. PRESTON, B. BOYD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

